Corrosion Resistance of Polyketone Materials

CO₂/H₂S/CH₄/heptane/hexane/toluene/deionized water mixed corrosive medium was prepared, and the high temperature corrosion resistance of polyketone (POK) material in the corrosive medium was studied by immersion test. The structural changes of the materials before and after corrosion were characterized by means of differential scanning calorimetry (DSC), X-ray diffraction (XRD) and infrared spectroscopy (IR). The results show that the tensile strength, elongation at break and hardness of POK after corrosion were reduced by 71.4%, 26.1% and 44.3%, respectively, and the mass was increased by 22.1%. The crystal form and group structure of POK did not change significantly, and the degree of crystallization was significantly reduced, resulting in a decrease in POK performance.